Sheryl Sandberg, COO of Facebook, always leaves the office at 5.30 so that she can have dinner with her kids at 6 (via Laura at 11d). I’m pretty sure that her commute is not like the average commute of the working mother of young children (bluemilk nails it as usual), and she probably has someone at home preparing the dinner, too, so she doesn’t have to spend the first half hour with tired, hungry, fractious kids while she scrambles some food together for everyone. She almost certainly spends lots of time later in the evening working in some way, and when she is in Washington talking to the President, she might have to be a virtual presence at dinner.

But that doesn’t invalidate the value of someone that senior speaking out about the value of family time. Too often the speech is from a man like Michael Hawker talking about how he spends 80 hours a week at work because he loves what he does. And so the model of a senior person is of someone who necessarily spends all their life at work. It becomes the only model of success.

I have found that when I am open about the fact that I leave the office early (I say 5, but it is more often 5.30 when I actually get out the door), a surprising number of senior people will admit to doing the same. But nearly all of those early leavers sneak out. They tend not to admit to wanting to have dinner with their kids, or any other reason for spending time with people not from work, in case some unspecified person thinks they aren’t serious enough.

We need to have more senior people, male and female, talking openly about the ways in which they carve out time in their lives for their families. And, of course, we need more senior people actually doing it.